Transform your balcony into a mini garden. You can do this with help from an array of potted plants, wooden chairs and bamboo walls. Pick out various tropical plants, flowers and cacti to complete the look.
Elf house on a tree! That would be cute in the garden, especially in the tree over grown with ivy. How about some battery tea lights in the windows during outdoor parties. I hear the fairies/elves whispering "home school project" in my ear.